| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.pig.newplan.logical.relational; |
| |
| import java.util.Map; |
| |
| import org.apache.pig.data.DataType; |
| import org.apache.pig.impl.logicalLayer.FrontendException; |
| import org.apache.pig.newplan.Operator; |
| import org.apache.pig.newplan.OperatorPlan; |
| import org.apache.pig.newplan.PlanVisitor; |
| import org.apache.pig.newplan.logical.expression.LogicalExpressionPlan; |
| import org.apache.pig.newplan.logical.expression.ProjectExpression; |
| import org.apache.pig.newplan.logical.relational.LogicalSchema.LogicalFieldSchema; |
| import org.apache.pig.parser.SourceLocation; |
| |
| /** |
| * Operator to map the data into the inner plan of LOForEach |
| * It can only be used in the inner plan of LOForEach |
| * |
| */ |
| public class LOInnerLoad extends LogicalRelationalOperator { |
| private ProjectExpression prj; |
| private LOForEach foreach; |
| private boolean sourceIsBag = false; |
| |
| public LOInnerLoad(OperatorPlan plan, LOForEach foreach, int colNum) { |
| super("LOInnerLoad", plan); |
| |
| // store column number as a ProjectExpression in a plan |
| // to be able to dynamically adjust column number during optimization |
| LogicalExpressionPlan exp = new LogicalExpressionPlan(); |
| |
| // we don't care about type, so set to -1 |
| prj = new ProjectExpression(exp, 0, colNum, foreach); |
| this.foreach = foreach; |
| } |
| |
| public LOInnerLoad(OperatorPlan plan, LOForEach foreach, String colAlias) |
| throws FrontendException { |
| super("LOInnerLoad", plan); |
| |
| // store column number as a ProjectExpression in a plan |
| // to be able to dynamically adjust column number during optimization |
| LogicalExpressionPlan exp = new LogicalExpressionPlan(); |
| |
| this.prj = new ProjectExpression( exp, 0, colAlias, null, foreach ); |
| this.foreach = foreach; |
| } |
| |
| public LOInnerLoad(LogicalPlan plan, LOForEach foreach, |
| ProjectExpression projectExpression) { |
| super("LOInnerLoad", plan); |
| this.prj = projectExpression; |
| this.prj.setInputNum(0); |
| this.prj.setAttachedRelationalOp(foreach); |
| this.foreach = foreach; |
| } |
| |
| @Override |
| public LogicalSchema getSchema() throws FrontendException { |
| if (schema!=null) |
| return schema; |
| |
| if (prj.findReferent().getSchema()!=null && prj.getFieldSchema()!=null) { |
| if (prj.getFieldSchema().type==DataType.BAG) { |
| sourceIsBag = true; |
| alias = prj.getFieldSchema().alias; |
| if (prj.getFieldSchema().schema!=null) { |
| LogicalFieldSchema tupleSchema = prj.getFieldSchema().schema.getField(0); |
| if (tupleSchema!=null && tupleSchema.schema!=null) { |
| schema = new LogicalSchema(); |
| for (int i=0;i<tupleSchema.schema.size();i++) |
| schema.addField(tupleSchema.schema.getField(i)); |
| } |
| } |
| } |
| else { |
| schema = new LogicalSchema(); |
| schema.addField(prj.getFieldSchema()); |
| } |
| } else if (!prj.isRangeOrStarProject()) { |
| schema = new LogicalSchema(); |
| schema.addField(new LogicalFieldSchema(null, null, DataType.BYTEARRAY)); |
| } |
| return schema; |
| } |
| |
| @Override |
| public void resetSchema(){ |
| super.resetSchema(); |
| prj.resetFieldSchema(); |
| } |
| |
| public ProjectExpression getProjection() { |
| return prj; |
| } |
| |
| @Override |
| public boolean isEqual(Operator other) throws FrontendException { |
| if (!(other instanceof LOInnerLoad)) { |
| return false; |
| } |
| |
| return (getColNum() == ((LOInnerLoad)other).getColNum()); |
| } |
| |
| @Override |
| public void accept(PlanVisitor v) throws FrontendException { |
| if (!(v instanceof LogicalRelationalNodesVisitor)) { |
| throw new FrontendException("Expected LogicalPlanVisitor", 2223); |
| } |
| ((LogicalRelationalNodesVisitor)v).visit(this); |
| } |
| |
| public int getColNum() { |
| return prj.getColNum(); |
| } |
| |
| /** |
| * Get the LOForEach operator that contains this operator as part of inner plan |
| * @return the LOForEach operator |
| */ |
| public LOForEach getLOForEach() { |
| return foreach; |
| } |
| |
| public boolean sourceIsBag() { |
| return sourceIsBag; |
| } |
| |
| public String toString() { |
| StringBuilder msg = new StringBuilder(); |
| |
| if (alias!=null) { |
| msg.append(alias + ": "); |
| } |
| msg.append("(Name: " + name); |
| msg.append("["); |
| if( getProjection().getColAlias() != null ) |
| msg.append( getProjection().getColAlias() ); |
| else if (getProjection().isProjectStar()) |
| msg.append("*"); |
| else if (getProjection().isRangeProject()) |
| msg.append(getProjection().getStartCol()) |
| .append(" .. ") |
| .append(getProjection().getEndCol()); |
| else |
| msg.append(getProjection().getColNum()); |
| msg.append("]"); |
| msg.append(" Schema: "); |
| if (schema!=null) |
| msg.append(schema); |
| else |
| msg.append("null"); |
| msg.append(")"); |
| if (annotations!=null) { |
| for (Map.Entry<String, Object> entry : annotations.entrySet()) { |
| msg.append(entry); |
| } |
| } |
| return msg.toString(); |
| } |
| |
| @Override |
| public void setLocation(SourceLocation loc) { |
| super.setLocation( loc ); |
| prj.setLocation( loc ); |
| } |
| } |